Specifications

Maintenance & Service Guide

Presario 1800 Series

Models: 1825 and 1800T

Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations

This section covers the following specifications of Compaq Presario 1800 Series Portable Computers:

●Physical and Environmental

●System Interrupts

●System DMA

●System I/O Address

●System Memory Catalog

●Display

●Memory Expansion

●Diskette or LS120 Drive

●Hard Drive

●DVD or CD drive

●Battery Pack

Physical and Environmental

Dimensions

Height

Depth

Width

Weight

Stand-Alone (Battery Pack) Power

Requirements

Nominal Operating

Maximum Average

Peak Operating

AC Power Requirements

Computer Specifications

U.S.	Metric
1.65 in	4.20 cm
13.00 in	33.00 cm
10.99 in	27.90 cm
7.9 lbs	3.58 kg

Li-ion 3.2 mAh

W @ 14.8 V

Operating Voltage

Operating Current

Operating Frequency

Maximum Transient

Temperature

Operating

Nonoperating

Relative Humidity (noncondensing)

100-240 V 0.8/0.4 A RMS 47-63 Hz

Meets IEC 801-4 and IEC801-5 1kV for 50 ns

50° to 95 °F	10° to 35 °C
-4° to 140 °F	-20° to 60 °C

Operating

Nonoperating (tw = 38.7°C max)

Altitude

Operating

Nonoperating

Shock

Operating

Non operating

Vibration

90%	10% to 90%
5% to 95%	5% to 95%

0 to 10,000 ft	0 to 3.05 km
0 to 30,000 ft	0 to 9.14 km

10 G, 11 ms, half sine

240 G, 2 ms, half sine

Operating	0.5 G

Nonoperating	1.5 G

NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq Explorer Series Portable Computers operate well within this range of temperatures.

Top of Page

System Interrupts

	System Interrupts
Hardware IRQ	System Function
IRQ0	System timer
IRQ1	Standard 101/102-key or Microsoft Natural Keyboard
IRQ2	Programmable interrupt controller
IRQ3	Lucent 56K V.90 PCI DF Modem
IRQ4	Communications Port (COM1)
IRQ5	ESS SOLO-1 PCI AudioDrive
IRQ5	RAGE LT PRO AGP 2X (English)
IRQ6	Standard Floppy Disk Controller
IRQ7	Printer Port (LPT1)
IRQ8	System CMOS/real time clock
IRQ9	Available
IRQ10	Available
IRQ11	Intel 21143/2 based 10/100 mbps Ethernet Controller
IRQ11	Texas Instruments PCI-1211 CardBus Controller
IRQ11	Intel 82371AB/EB PCI to USB Universal Host Controller
IRQ12	Synaptics PS/2 TouchPad
IRQ13	Numeric Data Processor
IRQ14	Intel 82371AB/EB PCI Bus Master Primary IDE Controller
IRQ15	Intel 82371AB/EB PCI Bus Master Secondary IDE Controller

Top of Page

System DMA

		System DMA
	Hardware DMA	System Function
	DMA 1	ESS SOLO-1 DOS Emulation
	DMA 2	Standard Floppy Disk Controller
	DMA 3	ECP Printer Port (LPT1)
	DMA 4	Direct memory access controller
Top of Page
System I/O Address

I/O Address (Hex)

0000h-000Fh

0020h-0021h

0040h-0043h

0060h-0060h

0061h-0061h

0064h-0064h

0070h-0071h

0072h-0073h

0080h-0080h

0081h-008Fh

00A0h-00A1h

00C0h-00DFh

00ECh-00EFh

00F0h-00FFh

0170h-0177h

01F0h-01F7h

0200h-0203h

0220h-022Fh

0330h-0331h

0376h-0376h

0378h-037Fh

0388h-038Bh

03B0h-03BBh

03C0h-03Dfh

03E0h-03E1h

03F0h-03F5h

03F6h-03F6h

03F7h-03F7h

03F8h-03FFh

04D0h-04D1h

0CF8h-0CFFh

2180h-218Fh

8000h-803Fh

E000h-EFFFh

E800h-E8FFh

F4D8h-F4DBh

F4DCh-F4DFh

F4E0h-F4Efh

F4F0h-F4FFh

F800h-F8FFh

FC00h-FC7Fh

FC88h-FC8Fh

FC90h-FC97h

FC90h-FC9Fh

FC98h-FC9F

FCA0h-FCBFh

FCC0h-FCFFh

Top of Page

System I/O Address

System Function (Shipping Configuration)

Direct memory access controller

Programmable interrupt Controller`

System timer

Standard 101/102-Key or Microsoft Natural Keyboard

System speaker

Standard 101/102-Key or Microsoft Natural Keyboard

System CMOS/real time clock

Motherboard resources

Direct memory controller

Programmable interrupt controller

Direct memory access Controller

Motherboard resources

Numeric data processor

Intel 82371AB/EB PCI Bus Master IDE controller

Secondary IDE controller (dual fifo)

Intel 82371AB/EB PCI Bus Master IDE controller

Primary IDE controller (dual fifo)

Gameport Joystick

ESS SOLO-1 DOS Emulation

Intel 82371AB/EB PCI Bus Master IDE Controller

Secondary IDE controller (dual fifo)

ECP Printer Port (LPT1)

ESS SOLO-1 DOS Emulation

RAGE LT PRO AGP 2X (English)

Motherboard resources

Standard Floppy Disk Controller

Intel 82371AB/EB PCI Bus Master IDE Controller

Primary IDE controller (dual fifo)

Standard Floppy Disk Controller

Communications Port (COM1)

Motherboard resource

PCI bus

Motherboard resources

Intel 82443BX Pentium ® II Processor to AGP controller

RAGE LT PRO AGP 2X (English)

ESS SOLO-1 PCI AudioDrive

Lucent 56K V.90 PCI DF Modem

Intel 21143/2 based 10/100 mbps Ethernet Controller

Lucent 56K V.90 PCI DF Modem

Primary IDE controller (dual fifo)

Intel 822371AB/EB PCI Bus Master IDE Controller

Secondary IDE controller (dual fifo)

Intel 82371AB/EB PCI to USB Universal Host Controller

ESS SOLO-1 PCI AudioDrive

System Memory Catalog

		System Memory Catalog
	Memory Address	System Function
	00000000h-0009FFFFh	System board extension for PnP BIOS
	000A0000h-000AFFFFh	RAGE LT PRO AGP 2X (English)
	000B0000h-000BFFFFh	RAGE LT PRO AGP 2X (English)
	000C0000h-000CBFFFh	RAGE LT PRO AGP 2X (English)
	000E0000h-000E7FFFh	Motherboard resources
	000E8000h-000FFFFFh	System board extension for PnP BIOS
	00100000h-03FFFFFFh	System board extension for PnP BIOS
	08000000h-08000FFFh	Texas Instruments PCI-1211 CardBus Controller
	F8000000h-FBFFFFFFh	Intel 82443BX Pentium ® ll Processor to PCI
		bridge
	FD000000h-FDFFFFFFh	RAGE LT PRO AGP2X (English)
	FD000000h-FECFFFFFh	Intel 82443BX Pentium ® ll Processor to AGP
		controller
	FE000000h-FE01FFFFh	RAGE LT PRO AGP 2X (English)
	FECFE000h-FECFFFFh	RAGE LT PRO AGP 2X (English)
	FEDFF800h-FEDFFBFFh	Intel 21143/2 based 10/100 mbps Ethernet
		Controller
	FEDFFC00h-FEDFFCFFh	Lucent 56K V.90 PCI DF Modem
	FFF80000h-FFFFFFFFh	Motherboard resources
Display

15.0" (Diagonal) TFT Display with LVDS

	U.S.	Metric
Dimensions	9.48 in	24.05 cm
Height	9.48 in	24.05 cm
Width	12.43 in	31.55 cm
Display Dimensions	8.99 in	22.81 cm
Height	8.99 in	22.81 cm
Width	11.98 in	30.41 cm
Depth	Information not available	Information not
		available
Weight	24.36 oz	690 gm
Contrast Ratio	150:1 mini
Brightness	120 cd/mm^3
Total Power Consumption	Information not available

Top of Page

14.1" (Diagonal) TFT Display with LVDS

			U.S.	Metric
	Dimensions		8.92 in	22.65 cm
	Height		8.92 in	22.65 cm
	Width		11.76 in	29.85 cm
	Display Dimensions		8.44 in	21.43 cm
	Height		8.44 in	21.43 cm
	Width		11.26 in	28.57 cm
	Depth		Information not Information not
			available	available
	Weight		19.94 oz	565 gm
	Contrast Ratio		150:1 mini
	Brightness		120 cd/mm^3
	Total Power Consumption		Information not available
Top of Page
Memory Expansion

		Memory Expansion
	System Memory	Expansion Board		Total Memory
		Memory
	64-MB			64-MB
	64-MB	32-MB		96-MB
	64-MB	64-MB		128-MB
	64-MB	128-MB		192-MB

Diskette or LS120 Drive

		Diskette Drive		LS120 Drive
Capacity per Diskette (High/Low)		1.44 MB/720KB		120 MB
Diskette Size	3.5"		3.5"
Number of LED Indicators (Read/Write)	0		1
Number of Drives Supported	1		1
Drive Rotation (rpm)	300		720
Transfer Rate (Kbps)	500		5458
Bytes per Sector	512		512
Sectors per Track (High/Low)	18/9
Tracks per Side (High/Low)	80
Access Times
Track-to-Track (ms)	3		20
Average (ms)	94		112
Setting Time (ms)	15		800
Latency Average (ms)	100		41.67
Cylinders (High/Low)	80		1736
Number of Read/Write Heads	2		2

Top of Page

Hard Drive

Capacity Per Drive

Drive Type

Logical Configuration

Cylinders

Heads

Sectors per track

Bytes per sector

Seek Times

(Typical, Including settling in ms) Single track

Average Full stroke

Transfer Rate At Interface

Top of Page

CD/DVD Drive

Dimensions

Weight

Rotational Speed

Typical Transfer Rate

Sustained Data Transfer

Rate

Access Time

Average Random Access Time

Spin Up time

Data Buffer Capacity

Top of Page

Hard Drive

4.8-GB	6.4-GB	10.0-GB	18.0-GB
4.8-GB	6.4-GB	10.0-GB	18.0-GB
11648	8647	11968	16383
3	4	6	6
190/330	190/330	190/330	Not available
512	512	512	512
4	4	4	2.5 (Read)
14	14	14	2.5 (Read)
24	24	24	12 (Read)
			23 (Read)
33.3 MB/s	33.3 MB/s	33.3 MB/s	33.3 MB/s

CD/DVD Drive

4x DVD	6x DVD	24x CD-ROM
128 x 129 x 12.7 mm	128 x 129 x 12.7mm	128 x 129 x 12.7 mm
0.27 kg	0.28 kg	<0.27 kg
2300 rpm	3450 rpm	4225 rpm
5400 KB/s	8100 KB/s	3600 KB/s

140 ms

120 ms

3.8 s	<15 s	2.7 s
128 KB	512 KB	128 KB

Battery Pack

Dimensions

Height

Length

Width

Weight

Battery Pack Operating Time

Energy

Nominal Open Circuit Voltage

Capacity

Power

Environmental Requirements

Operating Temperature

Non-operating Temperature

Charging Temperature

Battery Pack

Lithium Ion (Li ion) *

0.8in (20.3 mm)

5.7in (145 mm)

3.1in (78.7 mm)

0.90 lb (408.2 g) 2 hr 30 min*

14.4V

3200 mAH

46.1WH

32° F (0-50° C) -20° C -60° C 5° C-45° C

*The battery operating time changes depending on your power management settings, system components, options, and applications you use.

Top of Page

Compaq 1825, 1800T specifications Specifications

Models: 1825 1800T

Specifications

Physical and Environmental

Relative Humidity (noncondensing)

Vibration

System Interrupts

Hardware IRQ

System Function

System DMA

Hardware DMA

System Function

System I/O Address

I/O Address (Hex)

System I/O Address

System Function (Shipping Configuration)

System Memory Catalog

Memory Address

System Function

Display

15.0" (Diagonal) TFT Display with LVDS

Metric

Display Dimensions

14.1" (Diagonal) TFT Display with LVDS

Memory Expansion

Diskette or LS120 Drive

Hard Drive

CD/DVD Drive

CD/DVD Drive

4x DVD

6x DVD

24x CD-ROM

Battery Pack

Battery Pack

Lithium Ion (Li ion) *